/Engine/Source/Editor/Kismet/Public/BlueprintEditor.h
Called when a node's title is being committed for a rename so it can be verified
bool OnNodeVerifyTitleCommit ( const [FText](API\Runtime\Core\Internationalization\FText) & NewText, [UEdGraphNode](API\Runtime\Engine\EdGraph\UEdGraphNode) * NodeBeingChanged, [FText](API\Runtime\Core\Internationalization\FText) & OutErrorMessage )